(VB.NET UWP/WinRT) Export Digital Certificate's Public Key

The ExportPublicKey method can be called to get a certificate's public key. It can then be saved to any of a number of formats: (1) OpenSSL DER, (2) OpenSSL PEM, (3) RSA DER, (4) XML.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

Dim cert As New Chilkat.Cert

' LoadFromFile will load virtually any certificate format file.
' It will auto-recognize the format and load appropiately.
Dim success As Boolean = cert.LoadFromFile("/Users/chilkat/testData/cer/chilkat.cer")
If (success <> True) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


' Get the public key:
Dim pubkey As Chilkat.PublicKey

pubkey = cert.ExportPublicKey()
If (cert.LastMethodSuccess = False) Then
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If


' Save to various formats:
success = pubkey.SaveOpenSslDerFile("/Users/chilkat/testData/pubkeys/chilkat_openSsl.der")
If (success <> True) Then
    Debug.WriteLine(pubkey.LastErrorText)

    Exit Sub
End If


success = pubkey.SaveOpenSslPemFile("/Users/chilkat/testData/pubkeys/chilkat_openSsl.pem")
If (success <> True) Then
    Debug.WriteLine(pubkey.LastErrorText)

    Exit Sub
End If


success = pubkey.SaveRsaDerFile("/Users/chilkat/testData/pubkeys/chilkat_rsa.der")
If (success <> True) Then
    Debug.WriteLine(pubkey.LastErrorText)

    Exit Sub
End If


success = pubkey.SaveXmlFile("/Users/chilkat/testData/pubkeys/chilkat.xml")
If (success <> True) Then
    Debug.WriteLine(pubkey.LastErrorText)

    Exit Sub
End If



Debug.WriteLine("Public key exported to all file formats.")